Iris is a perennial grown for its blooms, which open in summer and return year after year. Notably, it shrugs off deer and shrugs off dry spells. Its summer flowers are a moderate draw for honeybees, native bees, and butterflies.
Zones
Data not available
pH Range
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Sun
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Days to Maturity
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What Iris is
Iris grows as a perennial and reaches around 2.5 feet at maturity. It blooms in summer. It's also deer-resistant.
How to grow Iris
USDA Zones
Data not available
USDA PHZM 2023
Soil pH
Data pending
USDA PLANTS Database
Sun
Data pending
plant_species_v5.csv
Drainage
Data pending
plant_species_v5.csv
Mature Height
2.5 ft
plant_species_v5.csv
Frost-Free Days
0+
plant_species_v5.csv
Start the season right
Plant iris in full sun, once the soil has warmed and frost risk has passed.
Match the soil
Pull a soil test from your local Extension lab to confirm pH and drainage match iris's needs before planting.
Water steadily
Keep the root zone evenly moist through establishment. Match watering to the plant's drainage preference and your local rainfall.
Harvest at its peak
Cut iris blooms in the cool of the morning, just as they open, for the longest display.
Good to know
One caution for pet owners — iris is toxic to dogs and cats (moderate severity). Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: ASPCA.)
Iris offers moderate value to bees and other pollinators. (Source: Xerces Society, Pollinator Partnership.)
Where Iris thrives
Whether iris thrives on a given site comes down to its soil pH, drainage, sun, and frost dates — the conditions that vary parcel to parcel.
See if Iris will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether iris actually takes — we score it against the real conditions at your address.
Three things about your exact spot that zone averages miss:
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Frequently Asked Questions
Can I grow Iris in my zone?
Zone data for iris is being finalized. A Growable Ground report checks your parcel's full suitability against federal soil, climate, and zone data.
When should you plant Iris?
Most growers plant iris after the last spring frost, once the soil has warmed. Your local frost dates set the exact window — a Growable Ground report reads them for your address.
What soil does Iris need?
Specific pH data for iris is pending. A soil test from your local Extension lab confirms what your site needs.
Does Iris attract pollinators?
Yes — iris's flowers are a solid nectar source for honeybees, native bees, and butterflies (Xerces Society, Pollinator Partnership).
Is Iris safe for pets?
Iris is toxic to pets (dogs,cats) with moderate severity. Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency.